bool insertRows(int row, int count, const QModelIndex &parent = QModelIndex());
bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
int rowOfDate(const QDate &date) const;
bool insertRows(int row, int count, const QModelIndex &parent = QModelIndex());
bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
int rowOfDate(const QDate &date) const;